Fuse



A. H. BAKKEN.

FUSE.

APPLICATION FILED MAY13,1918.

1,349,357, Patented Aug- 10, 1920.

WITNESSES: INVENTOR Ind/19w a Ea/rken A'TToRNEY ANDREW H. BAKKEN, 0F WILKINSBURG, PENNSYLVANIA ASSIGNOR T0 WESTING- HOUSE ELECTRIC & MANUFACTURING COMPANY, A CORPORATION OF PENN- SYLVAN IA.

FUSE.

Specification of Letters Patent.

Patented Aug. 10, 1920.

Application filed May 13, 1918. Serial No. 234,133.

To all whom it may concern:

Be it known that 1, ANDREW H. BAKKEN, a citizen of the United States, and a resident of Vl ilkinsburg, in the county of Allegheny and State of Pennsylvania have invented a new and useful Improvement in Fuses, of which the following is a specification.

My invention relates .to fuses and particularly to refillable fuses.

One object of my invention is to provide a terminal member for refillable fuse cartridges that shall securely clamp the fusible elements thereof in position.

Another object of my invention is to provide a device of the above-indicated character that shall comprise relatively few parts, he rugged and durable in construction, economical to manufacture and simple to manipulate.

ln practising my invention, 1 provide a rod or bar of wedge shape across the entrance of a tubular receptacle for support ing a fusible element and means for securely wedging the element in position thereon in response to a simple rotative movement of an outer end cap or ferrule.

Figure l of the accompanying drawings is a longitudinal view, partially in elevalion and partially in section, of a device embodying my invention; Fig. 2 is an end view of the device shown in Fig. 1, with the ferrule and terminal blade member removed, and Fig. 3 is an end view of the terminal blade member of the same.

A tubular receptacle 1, of fiber or other insulating material, has portions of each of its ends so cut away as to form a pair of oppositely disposed curved projections 2 thereon and each of said ends is provided with an exteriorly threaded metal ring 3 that has portions cut away similar to the manher in which the receptacle 1 is cut to form projections 12. The projections l2 closely engage and. conform to'the outside surface of the projections 2.

A diametral rod or bar 4 is located within each end of the receptacle 1 and extends between the projections 2 and is secured thereto by any suitable means such, for example, as rivets 5 that may also extend through the walls of the projections 12 to secure the latter to the receptacle 1. The arrangement, whereby the bar a is supported on the projections 2, provides a clear view into the casing, gives more ready access thereto, for the purpose of cleaning, and facilitates the removing and the renewin of the fusible element. While the bar 2 may be of any configuration, for economy and simplicity, I prefer that it be of rectangular cross section and so disposed that two of its dlagonallyopposite edges are in the axis of the tube 1. This arrangement presents a terminal of wedge shape around which the end or ends of a fusible element or elements 6 may be disposed. A terminal blade member 7 has an intermediate discoidal portion 8, beveled at the outer edge of its periphery, and inwardly projecting portions 9 the end faces of which conform to, and embrace, the adjacent side faces of the bar a.

An interiorly threaded ferrule 10 engages the threaded portion of the member 3 and has an annular inwardly projecting flange 11 at its outer end that is beveled to tightly fit the beveled face of the portion 8. By screwing the ferrule 10 on the member 3, the portions 9 may be caused to compress -the ends of the elements 6 tightly against the bar Thus, the member Tis given a longitudinal movement and is prevented from turning while being securely placed in operative position with respect to the receptacle l and the element 6.

The removable structure may be positioned with the member 7 in suitable terminal jaw members (not shown) of any circuit in which it is desired that a fuse be placed.

lVhile l have shown a particular form of my invention, changes may be made therein without departing from the spirit and scope thereof, as set forth in the appended claims.

I claim as my invention:

1. A fuse device comprising a terminal member having a transversely-extending oblique face, and a relatively movable memher having a surface conforming to the surface of said terminal member for the purpose of wedging a fusible element against the same.

2. A fuse device comprising a receptacle for a fusible element, a transversely-extending terminal member of wedge shape attached thereto, a member having a surface conforming to the adjacent surface of said terminal member for securely wedging said element against said terminal member and means for securing said members in wedging position.

3. A fuse device comprising a receptacle for a fusible element, a metal bar diametrally disposed therein and having side surfaces receding from one end thereof to support a fusible element, a member partially surrounding, and having surfaces substantially conforming to the adjacent surfaces of the bar, to wedge said element in engagement therewith, and means for securing said bar and said 'member in cooperative relation.

4. A fuse device comprising a hollow cylindrical receptacle having longitudinal projections at the ends thereof, a transverse bar secured to said projections, a terminal member partially surroundingrthe bar having end surfaces substantially conforming to side surfaces of said bar for securing a fusible element thereto, and an annular projecting portion, and means rotative' with respect to said receptacle for securing said terminal member in position.

5. A fuse device comprising a hollow cylindrical receptacle having longitudinal projections at the ends thereof, a bar disposed radially within said receptacle and secured to said projections, a terminal member having an end face substantially conforming to side faces of said bar for the purpose of securing a fusible element thereto and an annular projecting portion, an

annular screwthreaded ring secured to said a receptacle and a screw-threaded member for cooperation with said ring and slidably en-' gaging said annular projecting portion to secure said terminal member in position.

6. A fuse device comprising a receptacle for a fusible element, a radial bar disposed within one end of said receptacle, a terminal member for wedging a fusible element in engagement with said bar and a rotative member for causing said wedging engagement, the relation of said terminal member to said bar permitting a longitudinal movement of said terminal member against the fusible element and preventing the turning of said terminal member.

7. A refillable cartridge fuse comprising a casing having end projections, a bar extending between said projections, a terminal member partially embracing said'bar for securing a fusible element thereto and a member operatively connected to the casing for holding said terminal member in position.

8. A refillable cartridge fuse comprising a casing having end projections, a bar extending between said projections, a terminal member overlapping said bar for securing a fusible element thereto and means for holding said terminal member in position.

9. Arefillable cartridge fuse comprising a casing having end projections, a transverse bar extending between said projections and having a side surface receding from the end of the cartridge, a terminal member conforming to said side surface for securing a fusible element thereto and means for holding said terminal member in position.

In testimony whereof I have hereunto subscribed my name this 29th day of April 1918.

ANDREW H. BAKKEN. 

